#header{
    background-image: linear-gradient(to bottom,#212121,#616161);
    min-height: 30px;
    text-align: center;
    display: flex;
    justify-content: space-between;

}

.header-font{
    color: white;
    line-height: 30px;
    font-weight: 700;
}
/* 返回 */
#header-control{
    width: 33%;
    padding-left: 6px;
    display: flex;
    align-items: center;
}

#header-control div:nth-child(1){
    height: 18px;
    width: 18px;
    background: url(../img/icon/material/返回.svg) no-repeat;
    background-size: contain;
}

#msg{
    width: 34%;
    line-height: 30px;
    font-weight: 700;
}
/* 加号 */
#function{
    width: 33%;
    display: flex;
    justify-content: flex-end;
    align-items: center;
    padding-right: 8px;
}
/* 符号 */
#add{
    height: 22px;
    width: 22px;
    background: url(../img/icon/material/加号.svg) no-repeat;
    background-size: contain;
}